public List <SelectListItem> GetAllBatchSlItems()
        {
            var batches = _participantManager.GetAllBatch();
            var slItems = new List <SelectListItem>();

            foreach (var batch in batches)
            {
                var sli = new SelectListItem();
                sli.Text  = batch.No;
                sli.Value = batch.Id.ToString();
                slItems.Add(sli);
            }
            return(slItems);
        }